Attachment Coordination Report

This document pretains to SES-AMD-INTR2019-02999 for Amended Filing on a Satellite Earth Station filing.

IBFS_SESAMDINTR201902999_1849617

FREQUENCY COORDINATION AND INTERFERENCE
            ANALYSIS REPORT


                         Prepared for
        JAMES MADISON UNIVERSITY BOARD OF VISITORS
                     HARRISBURG, VA
                    Satellite Earth Station




                         Prepared By:
                        COMSEARCH
                 19700 Janelia Farm Boulevard
                     Ashburn, VA 20147
                       August 14, 2019


                                                      TABLE OF CONTENTS
1. CONCLUSIONS ............................................................................................................................................ 3
2. SUMMARY OF RESULTS ............................................................................................................................ 4
3. SUPPLEMENTAL SHOWING ....................................................................................................................... 5
4. EARTH STATION COORDINATION DATA .................................................................................................. 6
5. CERTIFICATION ......................................................................................................................................... 10




Frequency Coordination and Interference Analysis Report                                             08/14/2019                        Page 2 of 10


1. CONCLUSIONS



An interference study considering all existing, proposed and prior coordinated microwave
facilities within the coordination contours of the proposed earth station demonstrates that
this site will operate satisfactorily with the common carrier microwave environment.
Further, there will be no restrictions of its operation due to interference considerations.




Frequency Coordination and Interference Analysis Report   08/14/2019         Page 3 of 10


2. SUMMARY OF RESULTS


There were no great circle interference cases identified during the interference study of
the proposed earth station.



No carriers reported potential interference cases.




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3. SUPPLEMENTAL SHOWING
Pursuant to Part 25.203(c) of the FCC Rules and Regulations, the satellite earth station proposed in this
application was coordinated by Comsearch using computer techniques and in accordance with Part 25 of
the FCC Rules and Regulations.

Coordination data for this earth station was sent to the below listed carriers with a letter dated 08/14/2019.

        Company
        General Dynamics - OTS, Inc.
        MCI Communications Services Inc.




Frequency Coordination and Interference Analysis Report                 08/14/2019              Page 5 of 10


4. EARTH STATION COORDINATION DATA
This section presents the data pertinent to frequency coordination of the proposed earth station that was
circulated to all carriers within its coordination contours.




Frequency Coordination and Interference Analysis Report            08/14/2019            Page 6 of 10


                                                            COMSEARCH
                                                         Earth Station Data Sheet
                                             19700 Janelia Farm Boulevard, Ashburn, VA 20147
                                               (703)726-5500 http://www.comsearch.com

Date:                                    08/14/2019
Job Number:                              190814COMSTC06
Administrative Information
Licensee Code                            WMRAFM
Licensee Name                            JAMES MADISON UNIVERSITY BOARD OF VISITO
Site Information                         HARRISBURG, VA
Venue Name
Latitude (NAD 83)                        38° 26' 25.3" N
Longitude (NAD 83)                       78° 51' 31.7" W
Climate Zone                             A
Rain Zone                                2
Ground Elevation (AMSL)                  413.31 m / 1356.0 ft
Link Information
Satellite Type                           Geostationary
Mode                                     RO - Receive-Only
Modulation                               Digital
Satellite Arc                            60° W to 143° West Longitude
Azimuth Range                            151.2° to 253.2°
Corresponding Elevation Angles           41.3° / 11.5°
Antenna Centerline (AGL)                 2.74 m / 9.0 ft
Antenna Information                            Receive
Manufacturer                                   Comtech
Gain / Diameter                                42.9 dBi / 3.8 m
3-dB / 15-dB Beamwidth                         1.20° / 2.60°

Interference Objectives:    Long Term          -156.0 dBW/MHz        20%
                            Short Term         -146.0 dBW/MHz        0.01%
Frequency Information                          Receive 4.0 GHz
Emission / Frequency Range (MHz)               36M0G7W / 3700.0 - 4200.0


Max Great Circle Coordination Distance         348.5 km / 216.5 mi
Precipitation Scatter Contour Radius           533.1 km / 331.2 mi




Frequency Coordination and Interference Analysis Report                      08/14/2019        Page 7 of 10


                                                  COMSEARCH
                                              Earth Station Data Sheet
                                     19700 Janelia Farm Boulevard, Ashburn, VA 20147
                                       (703)726-5500 http://www.comsearch.com


Coordination Values             HARRISBURG, VA
Licensee Name                     JAMES MADISON UNIVERSITY BOARD OF VISITO
Latitude (NAD 83)                 38° 26' 25.3" N
Longitude (NAD 83)                78° 51' 31.7" W
Ground Elevation (AMSL)           413.31 m / 1356.0 ft
Antenna Centerline (AGL)          2.74 m / 9.0 ft
Antenna Mode                             Receive 4.0 GHz
Interference Objectives: Long Term       -156.0 dBW/MHz 20%
                         Short Term      -146.0 dBW/MHz 0.01%

                                                              Receive 4.0 GHz
               Horizon            Antenna                 Horizon        Coordination
Azimuth (°)    Elevation (°)      Discrimination (°)      Gain (dBi)     Distance (km)
 0              2.61              106.57                  -10.00          180.52
 5              2.30              111.48                  -10.00          187.60
 10             2.16              116.39                  -10.00          190.93
 15             1.88              121.28                  -10.00          197.84
 20             1.55              120.43                  -10.00          206.56
 25             1.45              116.97                  -10.00          206.89
 30             1.19              113.35                  -10.00          214.62
 35             1.15              109.73                  -10.00          215.60
 40             1.02              106.03                  -10.00          219.53
 45             0.86              102.27                  -10.00          227.91
 50             0.91               98.52                  -10.00          225.38
 55             0.94               94.73                  -10.00          223.73
 60             0.94               90.93                  -10.00          223.72
 65             0.95               87.12                  -10.00          223.06
 70             0.96               83.32                  -10.00          222.19
 75             1.00               79.53                  -10.00          220.32
 80             1.02               75.78                  -10.00          219.84
 85             0.74               72.16                  -10.00          234.69
 90             0.88               68.50                  -10.00          226.71
 95             1.15               64.85                  -10.00          215.64
100             1.02               61.46                  -10.00          219.73
105             1.20               58.05                  -10.00          214.03
110             1.08               54.95                  -10.00          217.80
115             1.14               51.94                  -10.00          216.06
120             1.61               48.85                  -10.00          205.00
125             1.60               46.36                   -9.65          204.59
130             1.46               44.31                   -9.16          210.73
135             2.03               42.00                   -8.58          200.53
140             1.78               40.84                   -8.28          205.84
145             1.92               39.80                   -8.00          205.91
150             2.25               39.08                   -7.80          199.32
155             2.46               39.01                   -7.78          194.72
160             1.67               40.44                   -8.17          209.30
165             1.78               41.49                   -8.45          205.21
170             1.88               42.61                   -8.74          203.61
175             1.93               43.30                   -8.91          201.44
180             1.97               43.50                   -8.96          200.08
185             1.95               43.27                   -8.91          200.88




Frequency Coordination and Interference Analysis Report                08/14/2019        Page 8 of 10


                                                  COMSEARCH
                                              Earth Station Data Sheet
                                     19700 Janelia Farm Boulevard, Ashburn, VA 20147
                                       (703)726-5500 http://www.comsearch.com


Coordination Values             HARRISBURG, VA
Licensee Name                     JAMES MADISON UNIVERSITY BOARD OF VISITO
Latitude (NAD 83)                 38° 26' 25.3" N
Longitude (NAD 83)                78° 51' 31.7" W
Ground Elevation (AMSL)           413.31 m / 1356.0 ft
Antenna Mode                             Receive 4.0 GHz
Interference Objectives: Long Term       -156.0 dBW/MHz 20%
                         Short Term      -146.0 dBW/MHz 0.01%

                                                              Receive 4.0 GHz
               Horizon            Antenna                 Horizon        Coordination
Azimuth (°)    Elevation (°)      Discrimination (°)      Gain (dBi)     Distance (km)
190             1.84               42.65                   -8.75          204.57
195             1.97               41.31                   -8.40          202.68
200             1.93               39.71                   -7.97          205.87
205             1.46               38.05                   -7.51          218.75
210             1.20               35.85                   -6.86          230.36
215             1.01               33.29                   -6.06          241.57
220             0.53               30.68                   -5.17          278.16
225             0.00               27.87                   -4.13          325.92
230             0.00               24.51                   -2.73          336.07
235             0.00               21.02                   -1.07          348.49
240             0.72               16.94                    1.28          311.00
245             1.04               13.24                    3.95          310.70
250             1.82               10.16                    6.83          303.41
255             1.93                9.69                    7.35          315.46
260             2.18               11.46                    5.52          280.18
265             2.30               14.87                    2.69          255.50
270             2.44               18.98                    0.04          233.80
275             2.81               23.35                   -2.21          212.04
280             3.08               27.96                   -4.16          199.01
285             3.20               32.72                   -5.87          187.90
290             3.49               37.51                   -7.35          173.99
295             3.55               42.38                   -8.68          163.91
300             3.79               47.25                   -9.86          152.76
305             3.88               52.16                  -10.00          150.38
310             4.01               57.09                  -10.00          147.82
315             4.14               62.02                  -10.00          145.76
320             4.23               66.97                  -10.00          144.41
325             4.26              71.92                   -10.00          143.92
330             3.99               76.89                  -10.00          148.20
335             4.02               81.84                  -10.00          147.57
340             3.86               86.80                  -10.00          150.69
345             3.54               91.75                  -10.00          157.31
350             3.27               96.70                  -10.00          163.31
355             2.81              101.64                  -10.00          175.82




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5. CERTIFICATION




I HEREBY CERTIFY THAT I AM THE TECHNICALLY QUALIFIED PERSON RESPONSIBLE FOR THE
PREPARATION OF THE FREQUENCY COORDINATION DATA CONTAINED IN THIS APPLICATION,
THAT I AM FAMILIAR WITH PARTS 101 AND 25 OF THE FCC RULES AND REGULATIONS, THAT I
HAVE EITHER PREPARED OR REVIEWED THE FREQUENCY COORDINATION DATA SUBMITTED
WITH THIS APPLICATION, AND THAT IT IS COMPLETE AND CORRECT TO THE BEST OF MY
KNOWLEDGE AND BELIEF.




Timothy O. Crutcher
Frequency Planner
COMSEARCH
19700 Janelia Farm Boulevard
Ashburn, VA 20147


DATED: August 14, 2019




Frequency Coordination and Interference Analysis Report   08/14/2019   Page 10 of 10



Document Created: 2019-08-14 15:33:51
Document Modified: 2019-08-14 15:33:51

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